SI Units List

The SI units list refers to the modern form of the metric system. Also, the SI unit full form is the International System of Units. Furthermore, it is the only system of measurement that carries an official status in almost all the countries of the world.

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Introduction to SI Units List

The SI Units list comprises a coherent system of units of measurement which begins with the seven base units. Furthermore, the seven base units are second, metre, kilogram, ampere, Kelvin, mole, and candela. The system also allows for derived units, which are an unlimited number of additional units and their representation can take place as products of powers of the base units.

Experts have provided twenty-two derived units with special symbols and names. Furthermore, use of the seven base units and the twenty-two derived units along with their special names and symbols may take place in combination to express other derived units, which are adopted in order to facilitate measurement of diverse quantities. Twenty prefixes are also provided by the SI system to the unit symbols and names when specifying SI unit’s power-of-ten (i.e. decimal) multiples and sub-multiples.

Base SI Units List

Length (l)        

SI Unit – Meter

SI Unit Symbol m

Mass (M)        

SI Unit – Kilogram

SI Unit Symbol – kg

Time (T)         

SI Unit – Second

SI Unit Symbol – s

Electric current (I)     

SI Unit – Ampere

SI Unit Symbol – A

Thermodynamic temperature (Θ)     

SI Unit – Kelvin

SI Unit Symbol – K

Amount of substance (N)       

SI Unit – Mole

SI Unit Symbol – mol

Luminous intensity (J)

SI Unit – Candela

SI Unit Symbol – cd

List of SI Derived Units

Force, Weight

SI Unit – Newton

SI Unit Symbol – N

Furthermore, expressed in SI Base Unit – kg⋅m⋅s-2

Also, expressed in other SI units – –

Frequency      

SI Unit – Hertz

SI Unit Symbol – Hz

Furthermore, expressed in SI Base Unit – s-1

Also, expressed in other SI units – –

Electric charge           

SI Unit – Coulomb

SI Unit Symbol – C

Furthermore, expressed in SI Base Unit – s⋅A

Also, expressed in other SI units – –

Electric potential (Voltage)   

SI Unit – Volt

SI Unit Symbol – V

Furthermore, expressed in SI Base Unit – kg.m2.s-3.A-1

Also, expressed in other SI units – W/A

Inductance     

SI Unit – Henry

SI Unit Symbol – H

Furthermore, expressed in SI Base Unit – kg.m2.s-2.A-2

Also, expressed in other SI units – Wb/A

Capacitance   

SI Unit – Farad

SI Unit Symbol – F

Furthermore, expressed in SI Base Unit – kg−1.m−2.s4.A2

Also, expressed in other SI units – C/V

Resistance, Impedance, Reactance   

SI Unit – Ohm

SI Unit Symbol – Ω

Furthermore, expressed in SI Base Unit – kg.m2.s−3.A−2

Also, expressed in other SI units – V/A

Electrical conductance          

SI Unit – Siemens

SI Unit Symbol – S

Furthermore, expressed in SI Base Unit – kg−1.m−2.s3.A2

Also, expressed in other SI units – Ω−1

Magnetic flux 

SI Unit – Weber

SI Unit Symbol – Wb

Furthermore, expressed in SI Base Unit – kg.m2.s−2.A−1

Also, expressed in other SI units – V⋅s

Magnetic flux density

SI Unit – Tesla

SI Unit Symbol – T

Furthermore, expressed in SI Base Unit – kg.s−2.A−1

Also, expressed in other SI units – Wb/m²

Energy, Work, Heat   

SI Unit – Joule

SI Unit Symbol – J

Furthermore, expressed in SI Base Unit – kg.m2.s−2

Also, expressed in other SI units – N⋅m = Pa⋅m³

Power, Radiant flux   

SI Unit – Watt

SI Unit Symbol – W

Furthermore, expressed in SI Base Unit – kg.m2.s−3

Also, expressed in other SI units – J/s

Angle  

SI Unit – Radian

SI Unit Symbol – rad

Furthermore, expressed in SI Base Unit – m.m−1

Also, expressed in other SI units – –

Radioactivity  

SI Unit – Becquerel

SI Unit Symbol – Bq

Furthermore, Expressed in SI Base Unit – s-1

Also, expressed in other SI units – –

Luminous flux 

SI Unit – Lumen

SI Unit Symbol – lm

Furthermore, expressed in SI Base Unit – cd

Also, expressed in other SI units – cd⋅sr

FAQs For SI Units List

Question 1: What is meant by SI base unit?

Answer 1: An SI base unit is one of the building blocks of the SI Units system and all the other units whose derivation takes place from them. Furthermore, there are a total of seven base units.

Question 2: Why is the SI Units system important?

Answer 2: First of all, the basis of the SI system is definite and precise standards. Secondly, the SI units physics use base 10, which makes conversion convenient and easy. Also, the SI units can be derived from one another without the use of conversion factors.